script.gs

// The Post url to send the embed to. This is where you should paste your webhook link.
var POST_URL = "Discord Webhook link here";

// onSubmit function that should be triggered when a new form is submitted.
function onSubmit(e) {
  // Get the form object
  var form = FormApp.getActiveForm();
  // Get all of the form's responses
  var allResponses = form.getResponses();
  // Get the latest response submitted to the form
  var latestResponse = allResponses[allResponses.length - 1];
  // Get an array containing all the responses to each question
  var response = latestResponse.getItemResponses();
  // Current items array to use in embed
  var items = [];
  // Current number characters being used in the current embed
  var currentEmbedCharacterNum = 0

  // For loop to iterate through responses
  for (var i = 0; i < response.length; i++) {
    // Get the question text
    var question = response[i].getItem().getTitle();
    // Get the answer text
    var answer = response[i].getResponse();

    // When checkbox questions are used, we need to compact the multiple choices into one answer string
    if (answer instanceof Array){
      answer = answer.join(", ");
    }

    // If the answer is over a certain number of characters, break it into multiple parts.
    try {
      var parts = answer.match(/[\s\S]{1,1024}/g) || [];
    } catch (e) {
      var parts = answer;
    }

    // If the answer text is blank, skip this iteration.
    if (answer == "") {
      continue;
    }

    if (question.length > 256){
      question = question.substring(0, 220) + "...";
    } 

    // For loop to iterate through the parts of an answer
    for (var j = 0; j < parts.length; j++) {
      // Add the number of characters in a part to the total character count of this embed
      currentEmbedCharacterNum += parts[j].length + question.length;
      // If the total character count with this part included pushes the total over 5000 (Discord Embeds have a character limit)
      if (currentEmbedCharacterNum >= 5000){
        // Send away an embed with the current items data
        sendEmbed(items);
        // Wait a second so Discord doesn't get overwhelmed with requests
        Utilities.sleep(50)
        // Reset the character count and items array
        currentEmbedCharacterNum = 0;
        items = [];
      }

      // If there are multiple parts to an answer, add a (cont.) to the names.
      if (j == 0) {
        items.push({
          "name": question,
          "value": parts[j],
          "inline": false
        });
      } else {
        items.push({
          "name": question.concat(" (cont.)"),
          "value": parts[j],
          "inline": false
        });
      }
    }
  }
  // Send an embed to the webhook.
  sendEmbed(items);

};

// Function to send an embed to the webhook url.
function sendEmbed(items){
  // Package the embed options into a variable
  var options = {
    "method": "post",
    "headers": {
      "Content-Type": "application/json",
    },
    "payload": JSON.stringify({
      "embeds": [{
        "title": "Some nice embed title here",
        "color": 33023, // This is optional, you can look for decimal colour codes at https://convertingcolors.com/
        "fields": items,
        "footer": {
          "text": "Some embed footer here"
        }
      }]
    })
  };

  // Post the data to the webhook.
  UrlFetchApp.fetch(POST_URL, options);
}